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  <dxl:Comment><![CDATA[
	create table t1 (a int, b int); 
	create table t2 (c  int, d int); 
	create index t2_d on t2 using btree(d); 
	create table foo (a int, b int) distributed by (a, b); 
	create table bar (c int, d int) distributed by (c, d); 
	create index bar_idx_d on bar using btree(d); 

	explain select * from (select t1.a from t1 join t2 on t1.a = t2.d) xx full join (select * from foo join bar on foo.a::int2 = bar.c::int4) yy on xx.a = yy.a;

	                                                     QUERY PLAN
	---------------------------------------------------------------------------------------------------------------------
	 Gather Motion 3:1  (slice5; segments: 3)  (cost=0.00..1299.00 rows=3 width=20)
	   ->  Merge Full Join  (cost=0.00..1299.00 rows=1 width=20)
	         Merge Cond: (t1.a = foo.a)
	         ->  Sort  (cost=0.00..437.00 rows=1 width=4)
	               Sort Key: t1.a
	               ->  Redistribute Motion 3:3  (slice2; segments: 3)  (cost=0.00..437.00 rows=1 width=4)
	                     Hash Key: t1.a
	                     ->  Nested Loop  (cost=0.00..437.00 rows=1 width=4)
	                           Join Filter: true
	                           ->  Broadcast Motion 3:3  (slice1; segments: 3)  (cost=0.00..431.00 rows=1 width=4)
	                                 ->  Seq Scan on t1  (cost=0.00..431.00 rows=1 width=4)
	                           ->  Index Scan using t2_d on t2  (cost=0.00..6.00 rows=1 width=1)
	                                 Index Cond: (d = t1.a)
	         ->  Sort  (cost=0.00..862.00 rows=1 width=16)
	               Sort Key: foo.a
	               ->  Redistribute Motion 3:3  (slice4; segments: 3)  (cost=0.00..862.00 rows=1 width=16)
	                     Hash Key: foo.a
	                     ->  Hash Join  (cost=0.00..862.00 rows=1 width=16)
	                           Hash Cond: ((int2(foo.a))::integer = bar.c)
	                           ->  Seq Scan on foo  (cost=0.00..431.00 rows=1 width=8)
	                           ->  Hash  (cost=431.00..431.00 rows=1 width=8)
	                                 ->  Broadcast Motion 3:3  (slice3; segments: 3)  (cost=0.00..431.00 rows=1 width=8)
	                                       ->  Seq Scan on bar  (cost=0.00..431.00 rows=1 width=8)
	 Optimizer: Pivotal Optimizer (GPORCA) version 3.57.0
	 (24 rows)
  ]]>
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